Android Aynctask不同版本的区别

来源：互联网发布：windows操作系统原理编辑：程序博客网时间：2024/04/29 15:15

今天查看4.4.2的Asynctask源码，发现有这么一段话，分享给大家，说的是AndroidAynctask不同版本的区别

<h2>Order of execution</h2>

* <p>When first introduced, AsyncTasks were executed serially on a single background

* thread. Starting with {@link android.os.Build.VERSION_CODES#DONUT（1.6）}, this was changed

* to a pool of threads allowing multiple tasks to operate in parallel. Starting with

* {@link android.os.Build.VERSION_CODES#HONEYCOMB（3.0）}, tasks are executed on a single

* thread to avoid common application errors caused by parallel execution.</p>

* <p>If you truly want parallel execution, you can invoke

* {@link #executeOnExecutor(java.util.concurrent.Executor, Object[])} with

* {@link #THREAD_POOL_EXECUTOR}.</p>

需要注意的问题：如果你使用的是3.0以上的jar，用到了executeOnExecutor这个方法，那么是不可以运行在3.0以下版本的，不然会报错，

想举一个例子的，不过本着不重复发明轮子的原则，直接给个链接吧，这位朋友写的很不错的：

http://blog.csdn.net/lichao3459/article/details/17712393

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